Thames and Kosmos
STEM Experiment Kit: Crystal Geode
STEM Experiment Kit: Crystal Geode
Regular price
$9.95 USD
Regular price
$9.95 USD
Sale price
$9.95 USD
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Grow a beautiful, colorful crystal geode — a hollow rock with crystals inside it — by first molding a plaster shell and then filling it with a crystal-forming solution. Learn about geological crystal formations.
